Ever thought about time travel? Ever wondered why it is impossible? Guess what, it's because time is not real. It's subjective. We think clocks measure time, well no, they measure themselves. The objective reference of a clock is another clock. Time is made up, so that we can have a reference point to compare things to. So if you are planning on creating a "Time Machine," first find an alternative to what we consider as time that is actually tangible and identify means to how to manipulate it.